Basquez is a soldier who operates a mounted, heavy artillery machine gun. He fires in bursts of three projectiles at a time and then makes a short pause. He remains stationary and cannot aim at any angle other than straight ahead. The bullets travel fast, though, and these units are usually emplaced in strategic positions where they may pin the player long enough for other infantry units to come and finish the job.
Adopting a prone position in front of these units will keep the player out of their line of fire and allow them to fire at will. However, as the machine gun is armored, it will take several shots to destroy.
In the arcade version, their behavior is slightly different, as the device is instead just an armored emplacement behind from which Basquez shelters himself; it has a peephole where a bazooka is inserted and fires one projectile at a time.
Basquez units later reappear in Contra: Legacy of War, where they can actually spin around while shooting. They keep appearing in following titles as well.
In Contra: Return, they shoot three-way bullets that travel straightforward.